Double Boost.

If you aren’t quite ready to ditch the front derailleur and switch to the single-minded ride style of a the one-by drivetrain, the Shimano XT FC-M8000-B2 Boost Double Crankset helps maintain gear range and adds timeless aesthetics to your whip. Pedal your boost-equipped ride up steep slopes with ease using the Hollowtech II crankarms, which are stiff and light and evoke the class-leading XTR system but with reinforcement that recommends them for proper all-mountain abuse.